use std::fmt;
#[derive(Debug)]
struct Point {
    x: i32,
    y: i32,
}

impl fmt::Display for Point {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "({}, {})", self.x, self.y)
    }
}

fn main() {
    let origin = Point { x: 0, y: 0 };
    println!("Display    : {} \n---",    origin);
    println!("Debug      : {:?} \n---",  origin);
    println!("Debug Extd.: {:#?} \n---", origin);
}